#include<iostream>
#include<set>
using namespace std;


void printSet(const set<int>& s){
        for(set<int>::const_iterator it=s.begin();it!=s.end();it++){
                cout<<*it<<" ";
        }
        cout<<endl;
}

int main(){

	set<int> s1;
	cout<<"s1.empty() = "<<s1.empty()<<endl;
	cout<<"s1.size()  = "<<s1.size()<<endl;

	set<int> s2={1,2,1,1,1,3,4,2,15,6,8};
	cout<<"s2.empty() = "<<s2.empty()<<endl;
	cout<<"s2.size() = "<<s2.size()<<endl;


	return 0;
}
